51
Tools recommended for impeller service:
•
Flat head screwdriver
•
13mm- hex wrench
•
3mm hex key
•
4mm hex key
•
5mm hex key
•
8mm hex key
•
Propane torch
•
3/8” diameter x 8” long steel rod
•
Hammer
COBRA IMPELLER SERVICE INSTRUCTIONS
1. Remove exhaust pipe and gas tank (you may be using a propane torch in step
12.
2. Remove radiator cap and drain engine coolant by removing the 13mm- hex head
coolant drain plug.
3. If the impeller is damaged or broken completely back flush the coolant system to
ensure no solid pieces are in the system.
4. Drain engine transmission oil by removing drain screw using a 13mm- hex
wrench. (item 2 in the figure below).
5. Remove right side radiator hose and unscrew coolant fitting with a 8mm hex key.
8. Remove ignition cover using a 4mm hex key (four places)
9. Stick a 3mm hex key in the water pump shaft cross hole, and remove belt
retainer screw using a 4mm hex key. (Figure 41 - item 1)
10. Remove belt retainer, water pump belt and water pump fan pulley.
11. Remove bearing retainer screw using a 3mm hex key. (Figure 38 – item 2)
Figure 38
12. Heat engine case around area of impeller lightly with a small propane torch.
Using a 3/8” diameter x 8” long steel rod, tap impeller assembly out of engine as
shown in figure 39.
